Thermostat



w. A. LACKE THERMOSTAT "-July 3, 1923.

Filed May 6, 1920 ZZz'a/m a f Sill Patented July 3, 1923.

UNITED STATES WILLIAM A. LAGIELE, GHICAGQ, ILLINQIEEZ.

Application filed May 8,

To all whom it may concern:

Be it known that I, WILLIAM A. Lncm, a citizen of the United States, residing Chicago, in the county of (look nnd State of lllinois, have invented a certain new end useful Improvement in Thermostats, of

which the following is a specification.

This invention relates to thermostatic mechanism for use in temperature regulation of various sorts of apparatus. it is especially adapted for use in connection with the regulation of steam radiators and boilers, hot air furnaces and other devices used in heating buildings.

The objects of the invention are to provide a clock controlled mechanism adopted to predetermined times, shift the temperature of regulation for the heat in a given room or apparatus from one redeterrninedtemperature to another, as for instance, from one temperature for day to another oy ni t; this in combination with mechanism by which the operator may at will electively very either the day or night temperan e, or both and this further in combination w-;n means for readily calibrating the instrument so that a readable scale will plainly i" onto to the operator the range of tcrnpeiw tnres through which the device operates.

The invention consists in means -for rying out the foregoing objects which on easily and cheaply made, which is very s isiactory in operation and is not readily lisble to get out oi order. More pcrticnl the invention consists in feat and details of construction more fully set forth in the specification and ole Referring to the drswings in W lcr numerals represent the some parts out several views,

Fig-"lire l is at face view of n constructed to illustrate this inver in preferred form,

Figure is itin side view port.

taken on the line 9r--2 of F g more 3 is a sectional plain vies 'snre l he line 3--3 in i certain, the some tcsen. on lar line M Figure Figure 5 is an inverted plan view on line 5-5, l ignr-e r 7 I ihe entire niecnsnisrn is csrr ler ones here illustrated, carr closing flanges 18 whose edges or other surface to which the device attached @n p te 16 near its bottom is a bracket 21?, to which is attached and about which coiled the usual thermostatic element 1% 1'89 vibrating arm 25 which serves as :.e ersmple of a thermostatically urged ineinher extends up the plate 16 along proximately center and by lateral movinent v erallel to the face of the plate is indicates or measures changes in thermostatic conditions of the room in which the de ce is located.

= ivoted to base at approximately the pivotal center about which the thermostatic m n 5 15 swings, in the particular case here strated the screw or stud 26, is ending carrier member, in siculcr case here illustrated, a. lever, or 28 adopted to swing latera across plate 16 in a plane between the arm and plate. ecnred the pendulum 28 by any suitable means is e, downwardly open ll-shaped insulating block 30 having its a embracing opposite sides of the thermostatic no to support the cdjnstchle electric contact screws 32 34 adapted to ti l engaged by the thermostatic arm 2 *v nc: lr7mm d 4* i d s 35 smu s thesis on iorwar Li indicate difierences These terminals 32 end 34 0. con by wires 35 end 38 to tcrrnin" 37 and con enient the hotlocated "t the thermostatic ole is connected by wire 39 to the located ietween terminals terminals 37, 38 and i0 wires t shown) to the d by the rnechanis 1 enziicn in such manner that wh engages contact s turned off and the pen nun-i T 2; much higher t the pendulnn" a, over the l concccts stop 106.

temperature will 25 will he cool enough to swing over against contact 32 and turn on the heat.

Pendulum 28 is provided at some point in its length, in the particular case here illustrated, at the extreme top of the plate 16 with a. graduated scale device designed to indicate the temperature at which the heat is shut on and off. In the particular case here illustrated this indicating device comprises a plate 42 attached to the plate 16 thru the agency of pin 44 and elongated slot 46 connections, so arranged that the plate 42 may be moved a substantial distance transversel on the plate 16. The plate 42 is provide with a graduated scale 48 registering with an indicating pointer 50' on the pendulum 28, said pointer in the particular case here illustrated lying on one side of the circular perforation 52 thru which the observer looks at the scale graduations 48. In the use of this particular part of the mechanism the operator takes a suitable thermometer and with the pendulum in the position shown determines what the term perature is, and thereupon adjusts the scale plate 42 so that the graduations of the scale 48 correspond to the indicated temperature. Thereupon subsequent rocking of the pendulum 28 about pivot 26 will cause the pointer 50 to register with graduations on the scale 48 one side or the other of the initial graduation corresponding to the actual temperature in the room ;it being of course understood that the scale 48 was originally made to indicate correctly these variations in temperature. The scale may be made originally or calibrated by making such a test for eac desired temperature and marking the positions of pointer 50 on scale 48.

Supported asu'bstantial distance in front of plate 16, is a clock mechanism 54. In the particular case here illustrated this is attached to the plate by a hinge mechanism 56 on one side and a catch mechanism 58 on the other side, both without special novelty and therefore not shown in detail. When the catch mechanism 58 is released the clock may in the'manner hereafter described be swung on the hinge 58 to obtain ready access to the back of the clock for winding, etc. as hereafter set forth. It is evident that this clock could also be reversed and the hinge be dispensed with in which case the clock would simply be supported in a non-pivotal position upside down on the plate 16, the winding and setting mechanism then being in proper position for manipulation and the arm 28 then passing over the top of the clock instead of under. In the particular case here illustrated this clock 54 is an or dinary clock having the usual time indicating front dial 60 and hands 62, and having on its rear a shaft 64 driven by the clock to rotate in unison with the hour hand one revolution per hour. The usual handle or thumb nut 66 for manually operating this shaft is shown in the drawing, but does not enter into the invention. Rigidly mounted upon the rear of the clock case, in the particular case here illustrated at a point near its bottom, is a stud 68 on which is journaled the hub 70 of a gear 7 2. Between gear 72 and shaft 64, heretofore described, is asuitably arranged train of gearing 74 so proportioned that gear 72 makes one complete revolution in 24 hours, as indicated by the clock.

Telescoping with the stud 68 and the hub 70 is a hub 76 carrying a dial plate 78 on whose face is placed as shown in Figure 4, graduations 80 indicating the 24 hours of the day. In the particular case here illustrated these graduations take the form used in this country of two sets of numerals reading from 1 to 12, one set indicating the time from noon to midnight and the other set the time from midnight to noon.

Hub 76 is, as shown in Figure 3, made substantially larger than hub 70, and is made with an angularly inclined central bore in which and against which the hub 82 of a cam 84 is adapted to lit and be pressed into frictional engagement thru the a ency of a washer 86, a sprin 88, and an a justing nut 90. The clock t erefore propels and consequently regulates cam 84-84. In actual practice these parts are 50 arranged that the cam 84 is held sufficiently tightly pressed against the hub of the disk 78 so that for practical purposes of operation of the device they are rigid with reference to each other but that the operator may by manually taking hold of the two parts adjust them angularlywith reference to each other under the control of spring 88.

The cam 84 is made in two parts 84 and 84 adapted to be angularly adjusted with reference to each other, for the purposes hereafter described, in the same manner that the cam is adjusted with reference to disk 78. The two cam parts 84 and 84 are normally held for practical purposes rigid with each other by the action of spring 88.

The cam 84 has a circular surface 92 and an inwardly cut surface 94. The object of having a cam made in two parts and adjusting them angularly with reference to each other, is to increase or decrease the circumferential length of the usuall but not necessarily high temperature. sur ace 92 so as to extend it at the will of the operator over a greater or less number of hours indicated on the disk 78this to take care of variations in the length of time during the day or night in which a given temperature is to be provided. In the particular case here illustrated, as shown in Figure 4, the complete cam 84 is arranged so that the temperature controlled by surface 92 is in effect from six in the morning until 9 at night, and the temperature controlled by or thru the presence of surfaces 9 k extends from 9 m, 6 a. 111. By shifting cam members 84 and 84 angularly of each other the cam may made, for instance to take care of the time from 7 a. m. to 8 p. m. By shifting entire com with reference to the dish 78 der the control of spring 88 the earn as adjusted scale 48. He then adjusts the stop 106 so that the pendulum 28 W111 just strike it when the thermostatic element 25 engages contact 32 at the temperature desired for the nifiht. By this adjustment the operator es- W to lishes the selectively variable tempera ture at which the device is to operate uheu cam face 92 is engaged by roller 100. He then takes hold of the emu 84- end adjusts it angure shown may be made to take care of the larly with reference to the disk78 and adjusts 75 temperature from 7 a. m. to 10 p m. or the parts of the com 8 5- With reference to each from i e. m. to 8 p. 111. etc. other, so that the temperature will livoted to the pendulum 28 at a conve he maintained the hours he Wishes ient point adjacent to but remote from and the uiinrimum temperature he correto com is a lever arm 96. In the purtioulor spondingly maintained. thereupon the decase here illustrated this pivoting is efiectel vice is ready for use for as many days, weeks by screw 98 passing thru the arm and so: or months as the op tor has no desire to tering the pendulum and so arranged th change his hours on temperature. When hy tightenin the screw the swihgiug changes are desired he; may he made in the 2@ 96 may he rigidly held in position or he manner ir icuted, l" hen the machine is so 35 in such so position that it is for worhi odjustedthe clock the ordineryrnan purposes rigid, but may be manually moves; nor. During .e hours, usually the de y hy' the operator sngularly shout the SCTEW when temperature is desired, the 98. The lower end of the arm 96 is Toroeller lllt trsvels surface 92,With con- 25 vided with s handle 99 for convenient mew ct 32 io engage. eh; with arm 25. As soon uipuletiou of the lever, as just descr hed es clotre 1 far enough so This lever 96 curries at its lower end 0, su that relies 100' tra bi on face 94-, sprii ohle roller 100 designed to travel upon 102 oeudul r. over against stop circular surface 92 of earn 84-. leve i06 thus for 45 into engagement 3%? 96 is nothing in the World hut cones T contsct or oh the heat means of shifting the distance hetWe-e" lch co i the clock moves 160 end the central axis of the pen restore roller 106* The peudulum 28 and conse hy throwing con 9% are normally drawn to lie with 25 and 555 in Figure l hy s rwrsctile soring r t e result that t roller 1% is 4 ct whe it l l is ooh lllGQIl the suns e 92 of 1 16 is provided ooi. Je --''ticuluL cuss here middle with elongated 7 v which is detuchohly s 106. the

. member engageable by said arm, a clock controlled cam operable to maintain said member and the contacts carried thereby in a predetermined operative relation with respect tosaid arm over a predetermined period of time, and an adjustable connection between said cam and member whereby the same operative relation aforementioned between the arm'and member may be main tained in different adjusted positions of the member with respect to the arm.

3. A thermostat including a thermally movable arm, a member adjustable with respect to said arm, contacts carried by said member engageable by said arm, a cam engageable element carried by said member, and a clock controlled cam engaging said element thereby to maintain the member and the contacts carried thereby in a predetermined operative relation with respect to said arm over a predetermined period of time, said cam engaging element being adjustable toward and away from said member whereby the same operative relation aforemen- 0 tioned between the arm and member may be maintained in diflerent adjusted positions of the member with res t to the arm.

4. A thermostat inc uding a thermally movable arm, a member adjustable with respect to said arm, contacts carried by said member engageable by said arm, a cam ongageable element carried by said member, and a clock controlled cam engaging said element thereby to maintain the member and the contacts carried thereby in a predetermined operative relation with respect to said arm over a predetermined period of time, said cam engaging element including a. lever pivoted to said member and adapted to be an larly adjusted with respect to said mem r thereby to dispose its cam engaging portion a greater or less distance from the member, whereby the same operative relation aforementioned between the arm and member may be maintained in different adjusted positions of the member with respect to the arm.

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses.

WILLIAM A. LACKE.

Witnesses:

W. F. PARKER, F. SCHRADER. 

